Originally Posted by
supine
Using them for short-haul is incredibly bad value, I'd only recommend that if you truly had no other chance to use them before expiry.
There is no way to check upgrade inventory. The existence of award inventory is a good sign, as is plentiful cash fare inventory, but neither is a guarantee that an upgrade will clear instantly or at any time before departure.
Honestly, eVouchers came as unexpected surprise from completing Status Match Challenge from SAS Gold. For me *A Gold is the most important, so I do not plan to flying with lufthansa a lot, so I would like to finde the most reliable use case where it is almost certain that upgrade would clear. I assume that short-haul upgrade outside of peak season is that case. Other option would be giving away these vouchers to someone else, but it is not possible to my current understanding. One excelent option would be upgradig existing Aegean booking, but I guess it is not possible using eVouchers there...